Freescale Semiconductor
Advance Information
Document Number: MC33742
Rev. 10.0, 5/2007
System Basis Chip (SBC) with
Enhanced High-Speed CAN
Transceiver
The 33742 and the 33742S are SPI-controlled System Basis Chips
(SBCs) combining many frequently used functions along with a CAN 2.0-
compliant transceiver, used in many automotive electronic control units
(ECUs). The 33742 SBC has a fully protected fixed 5.0 V low dropout
internal regulator with current limiting, overtemperature pre-warning, and
reset. A second 5.0 V regulator can be implemented using external pass
PNP bipolar junction pass transistor driven by the SBC’s external V2
sense input and V2 output drive pins.
The SBC has four main operating modes: Normal, Standby, Stop, and
Sleep mode. Additionally there is an internally switched high-side power
supply output, four wake-up inputs pins, a programmable window
watchdog, interrupt, reset, and a SPI module for communication and
control. The high-speed CAN A and B transceiver is available for inter-
module communication.
Features
• 1.0 Mbps CAN Transceiver Bus Interface with Bus Diagnostic
Capability
• SPI Control at Frequencies up to 4.0 Mhz
• 5.0 V Low Dropout Voltage Regulator with Current Limiting,
Overtemperature Pre-Warning, and Output Monitoring and Reset
• A Second 5.0 V Regulator Capability using an External Series Pass
Transistor
• Normal, Standby, Stop, and Sleep Modes of Operation with Low Sleep
and Stop Mode Current
• A High-Side (HS) Switch Output Driver for Controlling External
Circuitry.
• Pb-Free Packaging Designated by Suffix Code EG and EP
33742
33742S
SYSTEM BASIS CHIP
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42345B
28-PIN SOICW
EP SUFFIX
(PB-FREE)
98ARH99048A
48-PIN QFN
ORDERING INFORMATION
Device
MC33742DW/R2
MCZ33742EG/R2
MC33742SDW/R2
MCZ33742SEG/R2
PCZ33742EP/R2
48 QFN
- 40°C to 125°C
28 SOICW
Temperature
Range (T
A
)
Package
V
PWR
33742
5.0
V
VDD
VSUP
V2CTRL
V2
L0
L1
L2
L3
WDOG
HS
CANH
CANL
GND
V
2
MCU
CS
SCLK
MOSI
MISO
RST
CS
SCLK
MOSI
MISO
INT
TXD
RXD
V
PWR
SPI
Safe Circuitry
ECU Local
Supply
Tw
isted
CAN Bus
Pair
GND
Figure 1. 33742 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
